Generator and cut-out switch apparatus



W. B. MOSES.

GENERATOR AND CUT-OUT SWITCH APPARATUS.

APPLICATION FILED AUG- 18. 1919. 1,357,582.

Patented Nov. 2', 1920.

UNITED STATES PATENT OFFICE.

WILLIAM B. MOSES, 0F WATERTOWN, MASSACHUSETTS, ASSIGNOB To GRAY & nAvIS me, or CAMBRIDGE, MASSACHUSETTS.

' GENERATOR AND CUT-OUT SWITCH APPARATUS.

T 0 all whom it may concern Be it known that I, WILLIAM B. Moses, a citizen of the United States, residing at \Vatertown, in the county of Middlesex and State of Massachusetts, have invented certain new and usefullmprovements in Generator and Cut- Out Switch Apparatus, of which the following is a full, clear, and exact description.

This invention relates to generator and cut-out switch apparatus and with regard to certain more Specific features thereof to improved means for attaching a cut-out switch device to a generator.

It is one of the objects of the invention to provide simple, inexpensive and reliable means for attaching a separately produced and assembled automatic cut-out switch to the end cap or wall of a generator.-

Another object-of the invention is to so construct the automatic switch that the size of same is reduced to a minimum, and to so position the switch with respect to the generator, that the latter needs only the in stallation space transversely, required by its own transverse overall dimensions. Other objects would be in part obvious and in part pointed out hereinafter.

The invention accordingly consists of the various features of construction, combinations of elements and arrangements of parts exemplified by the construction hereinafterset forth and the scope of the application of which will be indicated in the following plan view of a cut- Fig. 1.

Fig. 3'is a left-end elevational view of the switch unit as viewed in Fig. 2.

Fig. 4 is a diagrammatic view showing the -magnet coils, circuits and movable contactcontrolling armature.

Referring now more particularly to the drawings, there is indicated at 1 a generator frame, having an end wall 2 at the commutator-end of the machine. Brush rigging is indicated generally at 3 comprising brush Specification of Letters Patent.

Patent ed Nov. 2, 1920;

'Application filed August 18, 1919. Serial No. 318,157.

carriers 4 and 5, pivotally mounted on studs 6 and 7 respectively, having threaded shanks 8 and 9 projecting through the end wall 2 of the machine. The brush holder 4 carries the positive brush and its stud shank 8 is grounded on the frame at the end Wall 2. The brush holder 5 carries the negative brush and its stud shank 9 is surrounded by an insulating bushing 10. Suitable washers are provided and locking nuts 11 are applied to secure the brush holders firmly to the end wall 2 of the machine. 1

The cut-out switch per 86 is an extremely small and compact organization built up principally of sheet metal stampings and in a general way corresponds to the cut-out switch shown and claimed in my co-pending application, Serial No. 318,158, filed August 18, 1919. The method of and structure for attaching the switch to the generator is however, different from that shown in my co-pending application, the present switch being particularly adapted toattach to the end Wall of the generator, utilizing extensions of the brush stud shanks as attaching means for the switch and in respect to one shank extension as a conductor. To this end the switch comprises an inverted cupshaped base 15 of sheet metal having a table 16 and a depending flange 17. Mount ed upon the table, and suitably insulated therefrom is the electro-magnet 18 comprising a shunt or actuating coil 19 and a series, holding and reversing coil 20 (shown in Fig. 4). One end of the shunt coil is passed through the base and soldered to the bottom surface of the table, as indicated at 21. The positive brush being grounded to the generator frame, the base 15 is grounded either through its connection with the frame or by reason of connection between the table 16 and extension of shank 8. The series coil is inserted in the system in the negative line between the batter and generator'and the other end of the sl iunt coil is connected to the series coil as indicated at 25. The base 15-is apertured at 26 to receive the extension of brush stud shank 8, and the base is apertured at 27 to receive with suitable clearance the extension of brush stud shank 9. The base and magnet having been assembled in any suitable manner the assembled unit may be applied to the end wall of the generator receiving the Shank extensions WhlCh latter penetrate far enough to receive securing nuts 30 and 81. By these nuts the switch unit is held securely in position against the end wall of the generator whereupon a cover or casing 32 of sheet metal may be applied and secured in any desired manner.

A strip of insulation is fixed diagonally across the under surface of the base table 16 and a conductor strip 41 is applied below this insulation connecting the negative terminal 42 with a central stud screw 43 which latter ,taps into the core of the magnet and holds the same against the base while at the same time completing the electrical circuit to the magnet cage 44. The negative terminal 42 is of course suitably insulated from the base 15.

As many changes might be made in the above construction, and as many apparently widely different embodiments of the invention might be made without departing from the scope thereof, it is intended that all matter set forth in the foregoing description, or shown in the accompanying drawings, shall be interpreted as illustrative, and not in a limitin sense.

What I c aim is: v

1. In apparatus of the character described, in combination, a generator frame, brush rigging carried by an end of said frame, a cut-out switch device, and means projecting from said brush rigging through said frame serving to support said cut-out switch device.

2. In apparatus of the character described, in combination, a generator frame, brush rigging carried b an end of said frame, a cut-out switch evice, means projecting from said brush rigging through said frame serving to support said cut-out switch device, and means cooperating with said last means adapted to detachably secure said cut-out switch in supported position.

8. In apparatus of the character described, in combination, a generator having an end wall, brush rigging inside the end wall, but

' having studs which penetrate said wall and project outwardly therefrom, and a cut-out switch device mounted over said studs.

4. In apparatus of the character described, in combination, a generator having an end -wall, brush rigging inside the end wall, but

having studs which penetrate said wall and project outwardly therefrom, a cut-out switch device mounted over said studs, and locking nuts cooperative with said studs to hold said switch against said end wall.

5. In apparatus of the character described, in combination a generator having an end wall, a pair of brushes mounted inside said wall by means of members projecting through said end wall, an elecgro-magnetic memes in combination a generator having an end wall, a pair of brushes mounted inside said wall by means of members projecting through said end wall, an electro-magnetic switch device penetrated by said members,

securing means cooperating with said members to hold said switch device in position on the end wall, said switch device having a hollow base, and means adapted to be housed by said base, when switch and generator are assembled, to cooperate with said members to hold said brushes in position on the inside of said wall.

I 7 In apparatus of the character described, in combination, a generator frame comprising an end wall, a brush having a mounting stud penetrating said wall and grounded thereto, another brush having a mounting stud penetrating said wall and insulated therefrom, m'eans cooperatively associable with said studs to hold said brushes to said wall, an electro-magnetic switch device having a base adapted to be penetrated by said studs, and means cooperatively associable with said studs to hold said switch device to the other side of said wall.

8. In apparatus of the character described, in combination, a generator frame comprising stud penetrating said wall and grounded thereto, another brush, having a mountingv stud penetrating said wall, and insulated therefrom, means cooperatively associable with said studs to hold said brushes to said wall, an electro-magnetic switch device having a base adapted to be penetrated by said studs, and means cooperatively associable with said studs to hold said switch device to the other side of said wall, said grounded stud being in electrical communication with said base.

9. In apparatus of the character described, in combination, a enerator frame comprising an end wall, a rush having a mounting stud penetrating said wall and grounded thereto, another brush having a mountin stud penetrating said wall and insulate therefrom, means cooperatively associable with said studs to hold said brushes to said Wall, an electro-m'agnetic switch device having a base adapted to be penetrated by said studs, and means cooperatively associable with said studs to hold said switch device to the other side of said wall, said base being adapted to fit in position over the first said means for holding the brushes to the wall. 

